Joint-fastener.



0. H. KIMBALL.

JOINT FASTENEE.

APPLICATION FILED NOV. 29, 1909.

Patented June '7, 1910.

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Patented June 7,1910.

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JOINT-FASTENER.

Application filed November 29, 1909.

T 0 all whom it may concern:

Be it known that I, CHARLES H. KIMBALL, a citizen of the United States,residing at Chicago, in the count-y of Cook and State of Illinois, haveinvented certain new and useful Improvements in Joint-Fasteners; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to joint fasteners, and while especially designedfor fastening the joints of a metal bedstead is not limited to such usein its general application.

An object of the present invention is to provide means extendingentirely through a tube ordinarily employed in bedstead and similarconstruction with means for engaging the contacting tubes at each end ofsaid tube.

A further object of the invention is to provide in combination withparallel tubes and with a tube extending between such parallel tubes, atfastening device extending longitudinally through such cross tube andhaving means for engaging the parallel tubes to hold them rigidly incontact with the ends of the cross tube.

With these and other objects in view, the invent-ion comprises certainnovel constructions, combinations and arrangements of parts as will behereinafter fully described and claimed.

In the drawings ;Figure 1 is a view in vertical section of the improvedfastening associated with a cross tube abutting the parallel tubes orproducing what is called in the art a mitered joint. Fig. 2 is atransverse sectional view of the embodiment shown at Fig. 1 and taken atright angles to such figure. Fig. 3 is a fragmentary view of a bedsteadshowing the mitered joints employed thereon. Fig. 4 is a view similar toFig. 1 but showing the upper end of the tube provided with a ferrulewhich is mitered instead of mitering the upper end of the tube itself.Fig. 5 is a view in side elevation of the embodiment shown at Fig. 3showing the ferrule mitered and also showing the lower end of the tubeitself mitered. Fig. 6 is a transverse sectional view of the embodimentof the present invention where the cross tube is inserted into openingsin the parallel tubes. Fig. 7 is a View of the embodiment shown at Fig.5 taken on a plane Specification of Letters Patent.

Patented June 7, 1910.

Serial No. 530,460.

at right angles to such figure. Fig. 8 is a view of a fragment of abedstead showing the application of the fastening as shown at Figs. 5and 6.

Like characters of reference designate corresponding parts throughoutthe several views.

In the construction and fastening of oints especially in metal work, andstill more especially in the construction of metal beds, it is founddesirable to produce a joint by abutting the ends of one tube againstthe side of another tube or by forming a curved cut in the end of suchcross tube which fits the periphery of the side of the tube to producewhat is known in the art as a mitered joint. It has been found verydiflicult heretofore to properly secure such mitered joint to produce arigid connection without employing means which spoils the looks of thejoint so constructed.

In the present invention parallel tubes 10 and 11 are employed shown atFig. 3 as the top and bottom rail of a bed and with cross tubes orspindles 12 having curved recesses formed in the ends of such crosstubes or spindles so that where such tubes or spindles 12 abut the tubes10 and 11 a mitered joint is formed as shown at Figs. 2 and 4.

Spindle 12 is provided adjacent its upper end with a collar 13 securedin such spindle in any approved manner as by shrinking and adjacent itslower end with a similar collar 14 similarly secured. The collars 13 and14: are bored to permit the passage of a rod 15 having a knee 16 adaptedto be inserted through an opening 17 in the rail 10 and to bear againstthe lower internal side of such rail 10.

At its lower end the rod 15 is screwthreaded as at 18 and a nut 19 issecured upon such threaded portion to bear against the collar 14: tohold the spindle 12 temporarily in connection with the tube 10. This issimply for the purpose of permitting all of the spindles 12 to beassembled on the tube 10 before applying the tube 11 thereto. Vhen thespindles 12 have all been put in place and temporarily secured by thenuts 19 the tube 11 provided with openings 20 is inserted over theextended screw-threaded ends of the rod 15 such extremities extendingonly about half way across the diameter of the tube 11. Internallythreaded screws 21 are now inserted through alined openings bytightening such screws the three tubes 10, 11, and 12 are rigidlysecured together. At Figs. 3 and 4 a ferrule 22 is secured externallyupon the upper-end of the spindle 12 which is cut 'to form a miteredjoint as indicated at 23 in Fig. 4: similar to the mitered joint 24 atthe lower end of such spindle. In some constructions, especially inemploying iron tubing, it is found desirable to insert the ends of thespindle 12" through openings formed in the sides of the upper rail 10and lower rail 11. In such case the spindle 12" is provided with a slot25 through which the knee 16 extends, the upper collar 13 beingpreferably eccentrically bored so that the rod '15 is disposed at aninclination within the spindle 12" as shown particularly at Fig. '5.

It will be noted, especially from Figs. '5 and 6,'that the ends-of thespindle 12 inserted through openings in the sides of the rails 10 and'11 engage against the opposite walls of such tubes, and that thetightening of the screws 21 will serve to hold the extremities of suchspindles 12 more rigidly in contact with the inner walls of the rails 10and 11. In constructions where rigid tubing as iron tubing is used, itis not usually found necessary to look more than one of the spindles asindicated at Fig. 7 whereas in the employment of softer tubing, as brasstubing, it is found necessary or highly desirable to lock each and everyspindle. For this reason the embodiment shown at Figs. 1 .to 5inclusive, is preferable for brass tubing while in the embodiment shownat Figs. 6 to 8 inclusive are equally tubes and registering withthe-openings, collars rigidly secured adjacent the opposite ends of thecross tube, a rod inserted through the cross tube and positioned by thecollars and having a hook at one end adapted to engage one of the spacedtubes, a lock nut engaging the rod and bearing against one of thecollars, and a screw engaging the extremity of the rod and exertingtension against the other spaced tube. V

2. In a device of the class described, a spindle, spaced tubes abuttingthe opposite endsof the spindle, a rod extending longitudinally throughthe spindle, a knee joint formed at the end of the rod and hooked intoone of the spaced tubes, and means inserted through the other spacedtube adapted to exert tensionupon the rod to clamp the spaced tubesrigidly against the ends of the spindles.

In testimony whereof I affix my signature in presence-of two witnesses.

CHARLES H. KIMBALL. Witnesses:

RALPH R. KIMBALL, W. L. BURT.

